Axion Haloscope Array With $\mathcal{PT}$ Symmetry
- URL: http://arxiv.org/abs/2103.12085v2
- Date: Sat, 2 Apr 2022 09:55:08 GMT
- Title: Axion Haloscope Array With $\mathcal{PT}$ Symmetry
- Authors: Yifan Chen, Minyuan Jiang, Yiqiu Ma, Jing Shu, Yuting Yang
- Abstract summary: We generalize the recently proposed $mathcalP T$-symmetric axion haloscope to a larger array with more $mathcalP T$-symmetric structures.
We show that the robustness of the detector towards the variations of the array coupling is the strongest when a binary tree structure is introduced.
- Score: 11.841164441352644
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We generalize the recently proposed $\mathcal{P T}$-symmetric axion haloscope
to a larger array with more $\mathcal{P T}$-symmetric structures. By broadening
the response bandwidth of the signal without increasing the readout noise, the
optimized scan rate of the axion haloscope is significantly enhanced, as well
as is the signal power. Furthermore, we show that the robustness of the
detector towards the variations of the array coupling is the strongest when a
binary tree structure is introduced which contains a largely enhanced
$\mathcal{P T}$ symmetry. The multiple allowed probing sensors can further
increase the scan rate by a factor of the sensors' number due to the
correlation of the signals. This type of array can strongly boost the search
for an axion compared to single-mode resonant detection. The enhancement to the
scan rate becomes the most manifest when applied to the proposed detection
using a superconducting radio-frequency cavity with an ac magnetic field where
most of the parameter space of the QCD axion above kHz can be probed.
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